LT1073_15 Datasheet, PDF (14/16 Pages) Linear Technology – Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

LT1073
TYPICAL APPLICATIO S
3V to 5V Step-Up Converter with Undervoltage Lockout
909k*
100k
L1^†
68µH
1N5818
100Ω
5V OUTPUT
100mA
LOCKOUT
AT 1.8V
2N3906
3V
100k
2.2M
100k*
I_LIM
V_IN
AO
SW1
LT1073
SET
FB
GND SW2
1M*
+
100µF
40.3k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-682k}
OR CADDELL-BURNS 7300-11
1073 TA17
1.5V to 5V Low Noise Step-Up Converter
680k
L1^†
82µH
1N5818
5V OUTPUT
20mV_P-P RIPPLE
I_LIM
V_IN
FB
SW1
1.5V
LT1073
AO
SET
GND SW2
909k*
+ _100µF
OS-CON
40.2k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-822k}
OR CADDELL-BURNS 7300-12
1073 TA18
1.5V to 5V Very Low Noise Step-Up Converter
680k
L1^†
470µH
1N5818
5V OUTPUT
5mA AT V_BATTERY = 1V
10mV_P-P RIPPLE
I_LIM
V_IN
FB
SW1
1.5V
LT1073
AO
SET
GND SW2
909k*
+ _100µF
OS-CON
40.2k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-473k}
OR CADDELL-BURNS 7300-21
EFFICIENCY = 83% AT 5mA LOAD
1073 TA19
9V to 5V Reduced Noise Step-Down Converter
+V_IN
6.5V TO 12V
680k
220Ω
L1^†
47µH
5V_OUT
90mA AT 6.5V_IN
I_LIM V_IN SW1
FB
LT1073
1N5818
100µF ⁺
OS-CON
909k*
AO
SET
GND SW2
40.2k*
* 1% METAL FILM
† _{L1 = GOWANDA GA10-472k}
OR CADDELL-BURNS 7300-09
EFFICIENCY ≈ 80%
I_Q ≈ 130µA
OUTPUT NOISE ≈ 100mV_P-P
1073 TA20
3V to 6V at 1A Step-Up Converter
INPUT
3V TO 6V
(2 LITHIUM CELLS)
L1^†
25µH
6V OUTPUT
1A AT
V_IN = 3V
+
1000µF
560k
549k*
I_LIM
V_IN
FB
SW1
LT1073
AO
SET
GND SW2
1N5818 _51Ω
20k*
* 1% METAL FILM
† _{L1 = COILTRONICS CTX25-5-52}
LOW I_Q (<250µA)
2N3906
5.1k
1N5820
+
2200µF
MTP3055EL
1073 TA21
14
1.5V Powered 350ps Risetime Pulse Generator
MUR120
90V BIAS
1.5V
L1^†
150µH
0.1µF _MUR120
220Ω
I_LIM
V_IN
SW1
LT1073
FB
GND SW2
MUR120
0.1µF
0.1µF
1M
C1
2pF TO 4pF
10M
Q1
2N2369
OUTPUT
5V INTO
50Ω PULSE
WIDTH ≈ 1ns
24k 10k
†_{L1 = TOKO 262LYF-0095K}
SELECT Q1 AND C1 FOR OPTIMUM RISE AND FALL
50Ω
1073 TA22